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Python璇誨啓鏂囦歡 1.open 浣跨敤open鎵撳紑鏂囦歡鍚庝竴瀹氳璁板緱璋冪敤鏂囦歡瀵硅薄鐨刢lose()鏂規硶銆傛瘮濡傚彲浠ョ敤try/finally璇彞鏉ョ‘淇濇渶鍚庤兘鍏抽棴鏂囦歡銆? file_object = open(‘thefile.txt’) try: all_the_text = file_object.read( ) finally: file_object.close( ) 娉細涓嶈兘鎶妎pen璇彞鏀懼湪try鍧楅噷錛屽洜涓哄綋鎵撳紑鏂囦歡鍑虹幇寮傚父鏃訛紝鏂囦歡瀵硅薄file_object鏃犳硶鎵цclose()鏂規硶銆? 2.璇繪枃浠? 璇繪枃鏈枃浠? input = open('data', 'r') #絎簩涓弬鏁伴粯璁や負r input = open('data') 1 2 3 璇諱簩榪涘埗鏂囦歡 input = open('data', 'rb') 1 璇誨彇鎵鏈夊唴瀹? file_object = open('thefile.txt') try: all_the_text = file_object.read( ) finally: file_object.close( ) 1 2 3 4 5 璇誨浐瀹氬瓧鑺? file_object = open('abinfile', 'rb') try: while True: chunk = file_object.read(100) if not chunk: break do_something_with(chunk) finally: file_object.close( ) 1 2 3 4 5 6 7 8 9 璇繪瘡琛? list_of_all_the_lines = file_object.readlines( ) 1 濡傛灉鏂囦歡鏄枃鏈枃浠訛紝榪樺彲浠ョ洿鎺ラ亶鍘嗘枃浠跺璞¤幏鍙栨瘡琛岋細 for line in file_object: process line 1 2 3.鍐欐枃浠? 鍐欐枃鏈枃浠? output = open('data', 'w') 1 鍐欎簩榪涘埗鏂囦歡 output = open('data', 'wb') 1 榪藉姞鍐欐枃浠? output = open('data', 'w+') 1 鍐欐暟鎹? file_object = open('thefile.txt', 'w') file_object.write(all_the_text) file_object.close( ) 1 2 3 鍐欏叆澶氳 file_object.writelines(list_of_text_strings) 1 娉ㄦ剰錛岃皟鐢╳ritelines鍐欏叆澶氳鍦ㄦц兘涓婁細姣斾嬌鐢╳rite涓嬈℃у啓鍏ヨ楂樸? 鍦ㄥ鐞嗘棩蹇楁枃浠剁殑鏃跺欙紝甯稿父浼氶亣鍒拌繖鏍風殑鎯呭喌錛氭棩蹇楁枃浠跺法澶э紝涓嶅彲鑳戒竴嬈℃ф妸鏁翠釜鏂囦歡璇誨叆鍒板唴瀛樹腑榪涜澶勭悊錛屼緥濡傞渶瑕佸湪涓鍙扮墿鐞嗗唴瀛樹負 2GB 鐨勬満鍣ㄤ笂澶勭悊涓涓?2GB 鐨勬棩蹇楁枃浠訛紝鎴戜滑鍙兘甯屾湜姣忔鍙鐞嗗叾涓?200MB 鐨勫唴瀹廣? 鍦?Python 涓紝鍐呯疆鐨?File 瀵硅薄鐩存帴鎻愪緵浜嗕竴涓?readlines(sizehint) 鍑芥暟鏉ュ畬鎴愯繖鏍風殑浜嬫儏銆備互涓嬮潰鐨勪唬鐮佷負渚嬶細 file = open('test.log', 'r')sizehint = 209715200 # 200Mposition = 0lines = file.readlines(sizehint)while not file.tell() - position < 0: position = file.tell() lines = file.readlines(sizehint) 1 姣忔璋冪敤 readlines(sizehint) 鍑芥暟錛屼細榪斿洖澶х害 200MB 鐨勬暟鎹紝鑰屼笖鎵榪斿洖鐨勫繀鐒墮兘鏄畬鏁寸殑琛屾暟鎹紝澶у鏁版儏鍐典笅錛岃繑鍥炵殑鏁版嵁鐨勫瓧鑺傛暟浼氱◢寰瘮 sizehint 鎸囧畾鐨勫煎ぇ涓鐐癸紙闄ゆ渶鍚庝竴嬈¤皟鐢?readlines(sizehint) 鍑芥暟鐨勬椂鍊欙級銆傞氬父鎯呭喌涓嬶紝Python 浼氳嚜鍔ㄥ皢鐢ㄦ埛鎸囧畾鐨?sizehint 鐨勫艱皟鏁存垚鍐呴儴緙撳瓨澶у皬鐨勬暣鏁板嶃? file鍦╬ython鏄竴涓壒孌婄殑綾誨瀷錛屽畠鐢ㄤ簬鍦╬ython紼嬪簭涓澶栭儴鐨勬枃浠惰繘琛屾搷浣溿傚湪python涓竴鍒囬兘鏄璞★紝file涔熶笉渚嬪錛宖ile鏈塮ile鐨勬柟娉曞拰灞炴с備笅闈㈠厛鏉ョ湅濡備綍鍒涘緩涓涓猣ile瀵硅薄錛? file(name[, mode[, buffering]]) 1 file()鍑芥暟鐢ㄤ簬鍒涘緩涓涓猣ile瀵硅薄錛屽畠鏈変竴涓埆鍚嶅彨open()錛屽彲鑳芥洿褰㈣薄涓浜涳紝瀹冧滑鏄唴緗嚱鏁般傛潵鐪嬬湅瀹冪殑鍙傛暟銆傚畠鍙傛暟閮芥槸浠ュ瓧絎︿覆鐨勫艦寮忎紶閫掔殑銆俷ame鏄枃浠剁殑鍚嶅瓧銆? mode鏄墦寮鐨勬ā寮忥紝鍙夌殑鍊間負r w a U錛屽垎鍒唬琛ㄨ錛堥粯璁わ級 鍐?娣誨姞鏀寔鍚勭鎹㈣絎︾殑妯″紡銆傜敤w鎴朼妯″紡鎵撳紑鏂囦歡鐨勮瘽錛屽鏋滄枃浠朵笉瀛樺湪錛岄偅涔堝氨鑷姩鍒涘緩銆傛澶栵紝鐢╳妯″紡鎵撳紑涓涓凡緇忓瓨鍦ㄧ殑鏂囦歡鏃訛紝鍘熸湁鏂囦歡鐨勫唴瀹逛細琚竻絀猴紝鍥犱負涓寮濮嬫枃浠剁殑鎿嶄綔鐨勬爣璁版槸鍦ㄦ枃浠剁殑寮澶寸殑錛岃繖鏃跺欒繘琛屽啓鎿嶄綔錛屾棤鐤戜細鎶婂師鏈夌殑鍐呭緇欐姽鎺夈傜敱浜庡巻鍙茬殑鍘熷洜錛屾崲琛岀鍦ㄤ笉鍚岀殑緋葷粺涓湁涓嶅悓妯″紡錛屾瘮濡傚湪 unix涓槸涓涓猏n錛岃屽湪windows涓槸‘\r\n’錛岀敤U妯″紡鎵撳紑鏂囦歡錛屽氨鏄敮鎸佹墍鏈夌殑鎹㈣妯″紡錛屼篃灝辮‘\r’ ‘\n’ ‘\r\n’閮藉彲琛ㄧず鎹㈣錛屼細鏈変竴涓猼uple鐢ㄦ潵瀛樿串榪欎釜鏂囦歡涓敤鍒拌繃鐨勬崲琛岀銆備笉榪囷紝铏借鎹㈣鏈夊縐嶆ā寮忥紝璇誨埌python涓粺涓鐢╘n浠ｆ浛銆傚湪妯″紡瀛楃鐨勫悗闈紝榪樺彲浠ュ姞涓? b t榪欎袱縐嶆爣璇嗭紝鍒嗗埆琛ㄧず鍙互瀵規枃浠跺悓鏃惰繘琛岃鍐欐搷浣滃拰鐢ㄤ簩榪涘埗妯″紡銆佹枃鏈ā寮忥紙榛樿錛夋墦寮鏂囦歡銆? buffering濡傛灉涓?琛ㄧず涓嶈繘琛岀紦鍐?濡傛灉涓?琛ㄧず榪涜“琛岀紦鍐?#8220;;濡傛灉鏄竴涓ぇ浜?鐨勬暟琛ㄧず緙撳啿鍖虹殑澶у皬錛屽簲璇ユ槸浠ュ瓧鑺備負鍗曚綅鐨勩? file瀵硅薄鏈夎嚜宸辯殑灞炴у拰鏂規硶銆傚厛鏉ョ湅鐪媐ile鐨勫睘鎬с? closed #鏍囪鏂囦歡鏄惁宸茬粡鍏抽棴錛岀敱close()鏀瑰啓 encoding #鏂囦歡緙栫爜 mode #鎵撳紑妯″紡 name #鏂囦歡鍚? newlines #鏂囦歡涓敤鍒扮殑鎹㈣妯″紡錛屾槸涓涓猼uple softspace #boolean鍨嬶紝涓鑸負0錛屾嵁璇寸敤浜巔rint 1 2 3 4 5 6 file鐨勮鍐欐柟娉曪細 F.read([size]) #size涓鴻鍙栫殑闀垮害錛屼互byte涓哄崟浣? F.readline([size]) #璇諱竴琛岋紝濡傛灉瀹氫箟浜唖ize錛屾湁鍙兘榪斿洖鐨勫彧鏄竴琛岀殑涓閮ㄥ垎 F.readlines([size]) #鎶婃枃浠舵瘡涓琛屼綔涓轟竴涓猯ist鐨勪竴涓垚鍛橈紝騫惰繑鍥炶繖涓猯ist銆傚叾瀹炲畠鐨勫唴閮ㄦ槸閫氳繃寰幆璋冪敤readline()鏉ュ疄鐜扮殑銆傚鏋滄彁渚泂ize鍙傛暟錛宻ize鏄〃紺鴻鍙栧唴瀹圭殑鎬婚暱錛屼篃灝辨槸璇村彲鑳藉彧璇誨埌鏂囦歡鐨勪竴閮ㄥ垎銆? F.write(str) #鎶妔tr鍐欏埌鏂囦歡涓紝write()騫朵笉浼氬湪str鍚庡姞涓婁竴涓崲琛岀 F.writelines(seq) #鎶妔eq鐨勫唴瀹瑰叏閮ㄥ啓鍒版枃浠朵腑銆傝繖涓嚱鏁頒篃鍙槸蹇犲疄鍦板啓鍏ワ紝涓嶄細鍦ㄦ瘡琛屽悗闈㈠姞涓婁換浣曚笢瑗褲? file鐨勫叾浠栨柟娉曪細 F.close() #鍏抽棴鏂囦歡銆俻ython浼氬湪涓涓枃浠朵笉鐢ㄥ悗鑷姩鍏抽棴鏂囦歡錛屼笉榪囪繖涓鍔熻兘娌℃湁淇濊瘉錛屾渶濂借繕鏄吇鎴愯嚜宸卞叧闂殑涔犳儻銆傚鏋滀竴涓枃浠跺湪鍏抽棴鍚庤繕瀵瑰叾榪涜鎿嶄綔浼氫駭鐢烿alueError F.flush() #鎶婄紦鍐插尯鐨勫唴瀹瑰啓鍏ョ‖鐩? F.fileno() #榪斿洖涓涓暱鏁村瀷鐨?#8221;鏂囦歡鏍囩“ F.isatty() #鏂囦歡鏄惁鏄竴涓粓绔澶囨枃浠訛紙unix緋葷粺涓殑錛? F.tell() #榪斿洖鏂囦歡鎿嶄綔鏍囪鐨勫綋鍓嶄綅緗紝浠ユ枃浠剁殑寮澶翠負鍘熺偣 F.next() #榪斿洖涓嬩竴琛岋紝騫跺皢鏂囦歡鎿嶄綔鏍囪浣嶇Щ鍒頒笅涓琛屻傛妸涓涓猣ile鐢ㄤ簬for ... in file榪欐牱鐨勮鍙ユ椂錛屽氨鏄皟鐢╪ext()鍑芥暟鏉ュ疄鐜伴亶鍘嗙殑銆? F.seek(offset[,whence]) #灝嗘枃浠舵墦鎿嶄綔鏍囪縐誨埌offset鐨勪綅緗傝繖涓猳ffset涓鑸槸鐩稿浜庢枃浠剁殑寮澶存潵璁＄畻鐨勶紝涓鑸負姝ｆ暟銆備絾濡傛灉鎻愪緵浜唚hence鍙傛暟灝變笉涓瀹氫簡錛寃hence鍙互涓?琛ㄧず浠庡ご寮濮嬭綆楋紝1琛ㄧず浠ュ綋鍓嶄綅緗負鍘熺偣璁＄畻銆?琛ㄧず浠ユ枃浠舵湯灝句負鍘熺偣榪涜璁＄畻銆傞渶瑕佹敞鎰忥紝濡傛灉鏂囦歡浠鎴朼+鐨勬ā寮忔墦寮錛屾瘡嬈¤繘琛屽啓鎿嶄綔鏃訛紝鏂囦歡鎿嶄綔鏍囪浼氳嚜鍔ㄨ繑鍥炲埌鏂囦歡鏈熬銆? F.truncate([size]) #鎶婃枃浠惰鎴愯瀹氱殑澶у皬錛岄粯璁ょ殑鏄鍒板綋鍓嶆枃浠舵搷浣滄爣璁扮殑浣嶇疆銆傚鏋渟ize姣旀枃浠剁殑澶у皬榪樿澶э紝渚濇嵁緋葷粺鐨勪笉鍚屽彲鑳芥槸涓嶆敼鍙樻枃浠訛紝涔熷彲鑳芥槸鐢?鎶婃枃浠惰ˉ鍒扮浉搴旂殑澶у皬錛屼篃鍙兘鏄互涓浜涢殢鏈虹殑鍐呭鍔犱笂鍘匯? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 http://www.cnblogs.com/allenblogs/archive/2010/09/13/1824842.html http://www.cnblogs.com/rollenholt/archive/2012/04/23/2466179.html<img src ="http://m.tkk7.com/xzclog/aggbug/433526.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://m.tkk7.com/xzclog/" target="_blank">xzc</a> 2018-11-28 11:52 <a href="http://m.tkk7.com/xzclog/archive/2018/11/28/433526.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>褰撳悓鏃跺畨瑁匬ython2鍜孭ython3鍚庯紝濡備綍鍏煎騫跺垏鎹嬌鐢ㄨ瑙ｏ紙姣斿pip浣跨敤錛?/title><link>http://m.tkk7.com/xzclog/archive/2018/11/16/433500.html</link><dc:creator>xzc</dc:creator><author>xzc</author><pubDate>Fri, 16 Nov 2018 01:38:00 GMT</pubDate><guid>http://m.tkk7.com/xzclog/archive/2018/11/16/433500.html</guid><wfw:comment>http://m.tkk7.com/xzclog/comments/433500.html</wfw:comment><comments>http://m.tkk7.com/xzclog/archive/2018/11/16/433500.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://m.tkk7.com/xzclog/comments/commentRss/433500.html</wfw:commentRss><trackback:ping>http://m.tkk7.com/xzclog/services/trackbacks/433500.html</trackback:ping><description><![CDATA[杞嚜錛歨ttps://www.cnblogs.com/shabbylee/p/6792555.html 鐢變簬鍘嗗彶鍘熷洜錛孭ython鏈変袱涓ぇ鐨勭増鏈垎鏀紝Python2鍜孭ython3錛屽張鐢變簬涓浜涘簱鍙敮鎸佹煇涓増鏈垎鏀紝鎵浠ラ渶瑕佸湪鐢佃剳涓婂悓鏃跺畨瑁匬ython2鍜孭ython3錛屽洜姝ゅ浣曡涓や釜鐗堟湰鐨凱ython鍏煎錛屽浣曡鑴氭湰鍦ㄥ搴旂殑Python鐗堟湰涓婅繍琛岋紝榪欎釜鏄煎緱鎬葷粨鐨勩? 瀵逛簬Ubuntu 16.04 LTS鐗堟湰鏉ヨ錛孭ython2錛?.7.12錛夊拰Python3錛?.5.2錛夐粯璁ゅ悓鏃跺畨瑁咃紝榛樿鐨刾ython鐗堟湰鏄?.7.12銆? 褰撶劧浣犱篃鍙互鐢╬ython2鏉ヨ皟鐢ㄣ? 濡傛灉鎯寵皟鐢╬ython3錛屽氨鐢╬ython3. 瀵逛簬Windows錛屽氨鏈夌偣澶嶆潅浜嗐傚洜涓轟笉璁簆ython2榪樻槸python3錛宲ython鍙墽琛屾枃浠墮兘鍙玴ython.exe錛屽湪cmd涓嬭緭鍏ython寰楀埌鐨勭増鏈彿鍙栧喅浜庣幆澧冨彉閲忛噷鍝釜鐗堟湰鐨刾ython璺緞鏇撮潬鍓嶏紝姣曠珶windows鏄寜鐓ч『搴忔煡鎵劇殑銆傛瘮濡傜幆澧冨彉閲忛噷鐨勯『搴忔槸榪欐牱鐨勶細 閭ｄ箞cmd涓嬬殑python鐗堟湰灝辨槸2.7.12銆? 鍙嶄箣錛屽垯鏄痯ython3鐨勭増鏈彿銆? 榪欏氨甯︽潵涓涓棶棰樹簡錛屽鏋滀綘鎯崇敤python2榪愯涓涓剼鏈紝涓浼氫綘鍙堟兂鐢╬ython3榪愯鍙︿竴涓剼鏈紝浣犳庝箞鍋氾紵鏉ュ洖鏀圭幆澧冨彉閲忔樉鐒跺緢楹葷儲銆? 緗戜笂寰堝鍔炴硶姣旇緝綆鍗曠矖鏆達紝鎶婁袱涓猵ython.exe鏀瑰悕鍟婏紝涓涓敼鎴恜ython2.exe錛屼竴涓敼鎴恜ython3.exe銆傝繖鏍峰仛鍥虹劧鍙互錛屼絾淇敼鍙墽琛屾枃浠剁殑鏂瑰紡錛屾瘯绔熶笉鏄緢濂界殑鏂規硶銆? 鎴戜粩緇嗘煡鎵句簡涓浜沺ython鎶鏈枃妗ｏ紝鍙戠幇鍙﹀涓涓垜瑙夊緱姣旇緝濂界殑瑙ｅ喅鍔炴硶銆? 鍊熺敤py鐨勪竴涓弬鏁版潵璋冪敤涓嶅悓鐗堟湰鐨凱ython銆俻y -2璋冪敤python2錛宲y -3璋冪敤鐨勬槸python3. 褰損ython鑴氭湰闇瑕乸ython2榪愯鏃訛紝鍙渶鍦ㄨ剼鏈墠鍔犱笂錛岀劧鍚庤繍琛宲y xxx.py鍗沖彲銆? #! python2 褰損ython鑴氭湰闇瑕乸ython3榪愯鏃訛紝鍙渶鍦ㄨ剼鏈墠鍔犱笂錛岋紝鐒跺悗榪愯py xxx.py鍗沖彲銆? #! python3 灝辮繖涔堢畝鍗曘? 鍚屾椂錛岃繖涔熷畬緹庤В鍐充簡鍦╬ip鍦╬ython2鍜宲ython3鍏卞瓨鐨勭幆澧冧笅鎶ラ敊錛屾彁紺篎atal error in launcher: Unable to create process using '"'鐨勯棶棰樸? 褰撻渶瑕乸ython2鐨刾ip鏃訛紝鍙渶 py -2 -m pip install xxx 褰撻渶瑕乸ython3鐨刾ip鏃訛紝鍙渶 py -3 -m pip install xxx python2鍜宲ython3鐨刾ip package灝辮繖鏍峰彲浠ュ畬緹庡垎寮浜嗐?img src 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GMT</pubDate><guid>http://m.tkk7.com/xzclog/archive/2018/05/18/433218.html</guid><wfw:comment>http://m.tkk7.com/xzclog/comments/433218.html</wfw:comment><comments>http://m.tkk7.com/xzclog/archive/2018/05/18/433218.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://m.tkk7.com/xzclog/comments/commentRss/433218.html</wfw:commentRss><trackback:ping>http://m.tkk7.com/xzclog/services/trackbacks/433218.html</trackback:ping><description><![CDATA[     鎽樿: Python 閲岄潰鐨勭紪鐮佸拰瑙ｇ爜涔熷氨鏄?nbsp;unicode 鍜?nbsp;str 榪欎袱縐嶅艦寮忕殑鐩鎬簰杞寲銆傜紪鐮佹槸 unicode -> str錛岀浉鍙嶇殑錛岃В鐮佸氨鏄?nbsp;str -> unicode銆傚墿涓嬬殑闂灝辨槸紜畾浣曟椂闇瑕佽繘琛岀紪鐮佹垨鑰呰В鐮佷簡.鍏充簬鏂囦歡寮澶寸殑"緙栫爜鎸囩ず"錛屼篃灝辨槸 # -*- codin...  <a href='http://m.tkk7.com/xzclog/archive/2018/05/18/433218.html'>闃呰鍏ㄦ枃</a><img src ="http://m.tkk7.com/xzclog/aggbug/433218.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://m.tkk7.com/xzclog/" target="_blank">xzc</a> 2018-05-18 09:52 <a href="http://m.tkk7.com/xzclog/archive/2018/05/18/433218.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item></channel></rss> <footer> <div class="friendship-link"> <p>感谢您访问我们的网站，您可能还对以下资源感兴趣：</p> <a href="http://m.tkk7.com/" title="亚洲av成人片在线观看">亚洲av成人片在线观看</a> <div class="friend-links"> </div> </div> </footer> 主站蜘蛛池模板： <a href="http://nit8.com" target="_blank">亚洲视频网站在线观看</a>| <a href="http://bjmyhfc.com" target="_blank">亚洲伦乱亚洲h视频</a>| <a href="http://0755host.com" target="_blank">亚洲欧洲高清有无</a>| <a href="http://sese3366.com" target="_blank">美女视频黄的免费视频网页</a>| <a href="http://868664.com" target="_blank">亚洲色偷偷狠狠综合网</a>| <a href="http://zfjhw.com" target="_blank">一级毛片在线播放免费</a>| <a href="http://bentuxinli.com" target="_blank">国产免费黄色大片</a>| <a href="http://www876444.com" target="_blank">美女视频黄.免费网址 </a>| <a href="http://240842.com" target="_blank">亚洲资源在线视频</a>| <a href="http://yanyingqiang.com" target="_blank">男人的天堂网免费网站</a>| <a 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